The　recent　progress　in　the　researches　on　semiconductor　photocatalysis　was　surveyed,　and　some　existed　problems　in　the　current　stud),　and　the　future　trend　of　development　were　briefly　analyzed.　The　main　achievements　in　the　studies　of　photocatalysis　during　the　recent　three　decades　were　particularized,　including　the　preparation　of　photocatalyst　(　exploitation　of　novel　catalyst,　and　the　modifications　to　TiO2,　ZnO　and　CdS　etc.),　mechanism　of　photocatalytic　process,　engineering　design　of　photocatalytic　reaction,　research　and　development　of　the　products　based　on　photocatalytic　principle.　Photocatalytic,　in　the　mass,　is　a　nonselective　chemical　process,　so　it　is　no　longer　important　to　redoing　a　great　deal　of　examination　of　photocatalytic　activity　for　different　reactants.　In　fact,　some　repeated　reports　on　the　semiconductorphotocatalytic　phenomena,　and　explanations　of　the　mechanism　withuot　or　lack　of　experiment　support　have　been　frequently　found　in　the　publications.　It　is　suggested　that　attention　of　the　future　investigation　on　the　semiconductor　photocatalysis　should　focus　on　the　four　aspects　as　followed,　i.e.　profound　comprehension　for　photocatalytic　mechanism,　synthesis　or　preparation　of　novel　photocatalyst　with　wide　response　to　light　and　high　photo　quantum　efficiency,　engineering　of　photocatalytic　reaction,　and　developing　of　new　type　photocatalytic　products.